Ive been in KIAH and KATL. Its about the same. My eyes rolled like "what on earth" by seeing like 4 planes on final in KORD, instead.
I saw them coming towards while the captain was holding short. We sneak in between second to third for landing and he just rolled out of the third pilot's landing runway.
I thought: Oh! that's busy!!
Altought stats indicate KATL is the busiest Airport.